[thataintright1]

Spot on. This “teacher” is doing a piss-poor job of challenging “conventional wisdom” that saves lives. What are students learning from him cavalierly running a hairdryer underwater and marching into electrified water?

Yes, electricians often have plenty of experience with getting shocked. But all it takes is one dumb mistake and you quickly die a horrible death, with muscles locked up unable to self-rescue in a location where immediate bystanders will risk their own lives to rescue.

What kind of dumbass proudly tells about wading into electrified flooding in front of colleagues when there wasn’t even any urgent reason to do so? What would it have cost to simply wait and cut the power first, calling the power company if necessary if a breaker box could not be safely reached for some reason (unlikely)?

And many/most circuits outside code-compliant kitchens and baths aren’t GFCI, and GFCI doesn’t protect against all electrocutions (you can be electrocuted in a short without a ground fault). Now consider electrical fires from getting sloppy with damaged wiring and electrical devices, which are a leading cause of deaths from fire.